Hi Elie, I love your patch! Perhaps something to improve: [auto build test WARNING on wsa/i2c/for-next] [also build test WARNING on v4.20-rc5 next-20181207] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Elie-Morisse/i2c-Add-drivers-for-the-AMD-PCIe-MP2-I2C-controller/20181209-070352 base: https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/for-next config: i386-allmodconfig (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): In file included from include/linux/printk.h:336:0, from include/linux/kernel.h:14, from include/linux/list.h:9, from include/linux/wait.h:7, from include/linux/wait_bit.h:8, from include/linux/fs.h:6, from include/linux/debugfs.h:15, from drivers/i2c/busses/i2c-amd-mp2-pci.c:9: drivers/i2c/busses/i2c-amd-mp2-pci.c: In function 'amd_mp2_dma_map': >> drivers/i2c/busses/i2c-amd-mp2-pci.c:125:30: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 5 has type 'dma_addr_t {aka unsigned int}' [-Wformat=] dev_dbg(ndev_dev(privdata), "%s dma_addr: %llx size: %u dir: %s\n", ^ include/linux/dynamic_debug.h:135:39: note: in definition of macro 'dynamic_dev_dbg' __dynamic_dev_dbg(&descriptor, dev, fmt, \ ^~~ include/linux/device.h:1463:23: note: in expansion of macro 'dev_fmt' dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__) ^~~~~~~ >> drivers/i2c/busses/i2c-amd-mp2-pci.c:125:2: note: in expansion of macro 'dev_dbg' dev_dbg(ndev_dev(privdata), "%s dma_addr: %llx size: %u dir: %s\n", ^~~~~~~ drivers/i2c/busses/i2c-amd-mp2-pci.c: In function 'amd_mp2_debugfs_read': drivers/i2c/busses/i2c-amd-mp2-pci.c:384:16: warning: unused variable 'mmio' [-Wunused-variable] void __iomem *mmio = privdata->mmio; ^~~~ vim +125 drivers/i2c/busses/i2c-amd-mp2-pci.c > 9 #include <linux/debugfs.h> 10 #include <linux/dma-mapping.h> 11 #include <linux/interrupt.h> 12 #include <linux/module.h> 13 #include <linux/pci.h> 14 #include <linux/slab.h> 15 16 #include "i2c-amd-mp2.h" 17 18 #define DRIVER_NAME "i2c_amd_mp2" 19 #define DRIVER_DESC "AMD(R) PCI-E MP2 I2C Controller Driver" 20 #define DRIVER_VER "1.0" 21 22 static inline void write64(u64 val, void __iomem *mmio) 23 { 24 writel(val, mmio); 25 writel(val >> 32, mmio + sizeof(u32)); 26 } 27 28 static inline u64 read64(void __iomem *mmio) 29 { 30 u64 low, high; 31 32 low = readl(mmio); 33 high = readl(mmio + sizeof(u32)); 34 return low | (high << 32); 35 } 36 37 static void amd_mp2_c2p_mutex_lock(struct amd_i2c_common *i2c_common) 38 { 39 struct amd_mp2_dev *privdata = i2c_common->mp2_dev; 40 41 /* there is only one data mailbox for two i2c adapters */ 42 mutex_lock(&privdata->c2p_lock); 43 privdata->c2p_lock_busid = i2c_common->bus_id; 44 } 45 46 static void amd_mp2_c2p_mutex_unlock(struct amd_i2c_common *i2c_common) 47 { 48 struct amd_mp2_dev *privdata = i2c_common->mp2_dev; 49 50 if (unlikely(privdata->c2p_lock_busid != i2c_common->bus_id)) { 51 dev_warn(ndev_dev(privdata), 52 "bus %d attempting to unlock C2P locked by bus %d\n", 53 i2c_common->bus_id, privdata->c2p_lock_busid); 54 return; 55 } 56 57 mutex_unlock(&privdata->c2p_lock); 58 } 59 60 static int amd_mp2_cmd(struct amd_i2c_common *i2c_common, 61 union i2c_cmd_base i2c_cmd_base) 62 { 63 struct amd_mp2_dev *privdata = i2c_common->mp2_dev; 64 void __iomem *reg; 65 66 i2c_common->reqcmd = i2c_cmd_base.s.i2c_cmd; 67 68 reg = privdata->mmio + ((i2c_cmd_base.s.bus_id == 1) ? 69 AMD_C2P_MSG1 : AMD_C2P_MSG0); 70 writel(i2c_cmd_base.ul, reg); 71 72 return 0; 73 } 74 75 int amd_mp2_bus_enable_set(struct amd_i2c_common *i2c_common, bool enable) 76 { 77 struct amd_mp2_dev *privdata = i2c_common->mp2_dev; 78 union i2c_cmd_base i2c_cmd_base; 79 80 dev_dbg(ndev_dev(privdata), "%s id: %d\n", __func__, 81 i2c_common->bus_id); 82 83 i2c_cmd_base.ul = 0; 84 i2c_cmd_base.s.i2c_cmd = enable ? i2c_enable : i2c_disable; 85 i2c_cmd_base.s.bus_id = i2c_common->bus_id; 86 i2c_cmd_base.s.i2c_speed = i2c_common->i2c_speed; 87 88 amd_mp2_c2p_mutex_lock(i2c_common); 89 90 return amd_mp2_cmd(i2c_common, i2c_cmd_base); 91 } 92 93 static void amd_mp2_cmd_rw_fill(struct amd_i2c_common *i2c_common, 94 union i2c_cmd_base *i2c_cmd_base, 95 enum i2c_cmd reqcmd) 96 { 97 i2c_cmd_base->s.i2c_cmd = reqcmd; 98 i2c_cmd_base->s.bus_id = i2c_common->bus_id; 99 i2c_cmd_base->s.i2c_speed = i2c_common->i2c_speed; 100 i2c_cmd_base->s.slave_addr = i2c_common->msg->addr; 101 i2c_cmd_base->s.length = i2c_common->msg->len; 102 } 103 104 static int amd_mp2_dma_map(struct amd_mp2_dev *privdata, 105 struct amd_i2c_common *i2c_common) 106 { 107 enum dma_data_direction dma_direction = 108 i2c_common->msg->flags & I2C_M_RD ? 109 DMA_FROM_DEVICE : DMA_TO_DEVICE; 110 111 i2c_common->dma_buf = i2c_get_dma_safe_msg_buf(i2c_common->msg, 0); 112 i2c_common->dma_addr = dma_map_single(&privdata->pci_dev->dev, 113 i2c_common->dma_buf, 114 i2c_common->msg->len, 115 dma_direction); 116 117 if (dma_mapping_error(&privdata->pci_dev->dev, 118 i2c_common->dma_addr)) { 119 dev_err(ndev_dev(privdata), 120 "Error while mapping dma buffer %p\n", 121 i2c_common->dma_buf); 122 return -EIO; 123 } 124 > 125 dev_dbg(ndev_dev(privdata), "%s dma_addr: %llx size: %u dir: %s\n", 126 __func__, i2c_common->dma_addr, i2c_common->msg->len, 127 dma_direction == DMA_FROM_DEVICE ? "from" : "to"); 128 129 return 0; 130 } 131 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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